Massena STP
Massena, NY · St. Lawrence County · Publicly Owned Treatment Works
- Average flow
- —
- Design flow
- 4.8 MGD
- NPDES permit
- NY0031194
- Administratively continued
- Permit expires
- November 2020
- Population served
- 12,268
- CWNS 2022
Massena STP is a publicly owned wastewater treatment works in Massena, St. Lawrence County, New York, serving about 12,268 residents. Treatment on site includes clarifiers, biogas silos. It discharges under NPDES permit NY0031194 (administratively continued), which expires in November 2020, with 11 recorded violations in the last three years.
Treatment technology
Treatment structures identified at this facility. Exact unit counts are available in Klarifi.
Compliance snapshot (last 3 years)
- Total violations
- 11
- Effluent violations
- 11
Based on NPDES Discharge Monitoring Reports. Full violation history, parameters and discharge data available in the Klarifi platform.
Key contacts
3 verified contacts for Massena STP, with validated emails and direct phone numbers.
Unlock 3 verified contacts
Names, validated emails and direct phone numbers for decision-makers at Massena STP, plus the full compliance history and discharge data.
Nearby wastewater treatment plants in New York
Norfolk · 11 mi away
0.06 MGD
North Lawrence · 14 mi away
0.02 MGD
Norwood · 15 mi away
0.14 MGD
Waddington · 16 mi away
0.05 MGD
Potsdam · 19 mi away
1.05 MGD
Fort Covington · 19 mi away
0.02 MGD
Saint Regis Falls · 24 mi away
0.03 MGD
Lisbon · 26 mi away
0.01 MGD
Massena STP: frequently asked questions
Sources and methodology
Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.
Data refreshed September 11, 2026; facility record last updated March 2, 2025.